Quote:
Originally Posted by jjungel
i currently use the S9 and love the results. question: whats the difference between S9 and S9HD? ![headbang](http://forum.ppcgeeks.com/images/smilies/headbang.gif)
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I have both (& an 820) the new HD has WOW built into it & the earpieces isolate a little better than the older S9.
~John